Neither head coach Mark Jackson nor Andrew Bogut knows how the Warriors' center incurred a left shoulder injury, a condition that has sidelined Bogut for three games.

Jackson didn't do Bogut any favors Monday with one possible explanation.

"As far as I know, it wasn't on the court," Jackson said before the Warriors faced Philadelphia. "It wasn't in practice. It wasn't in a game. I'm not really sure. It may have been sleeping, and I say that in all seriousness."

That remark didn't sit well with Bogut.

"I just wanted to address that the sleeping comment is absolutely ridiculous," Bogut said. "I don't know where it came from. I don't know if I should read between the lines with it. The frustrating thing is: I don't know when I hurt it against Utah (on Jan. 31). I just know after that game, it was a little sore. It hasn't gotten better."

Bogut called the injury a bone bruise, and he said an MRI exam showed no structural damage. He's hoping that the All-Star break this weekend will allow him to recover enough to get back on the court.

Bogut said he'll decide in the next couple of days whether to get a cortisone shot, and he planned to talk to Jackson about his comments after Monday's game.

"I don't know where (the sleeping comment) came from or if he heard that from the trainer or from somebody, but it's definitely not the case," Bogut said. "It's not like I just woke up after sleeping on my shoulder wrong. I have a bone bruise and swelling in my shoulder. That coming from sleeping is very highly unlikely, I believe."

Jackson did call Bogut's injury "legitimate." He said: "Let's be smart with him. We're looking ahead at a whole week of rest and recovery, and we need him."